org.springframework.context.event

Class EventPublicationInterceptor

java.lang.Object

org.springframework.context.event.EventPublicationInterceptor

All Implemented Interfaces:

Advice, Interceptor, MethodInterceptor, Aware, InitializingBean, ApplicationEventPublisherAware

public class EventPublicationInterceptor
extends Object
implements MethodInterceptor, ApplicationEventPublisherAware, InitializingBean

Interceptor that publishes an ApplicationEvent to all ApplicationListeners registered with an ApplicationEventPublisher after each successful method invocation.

Note that this interceptor is only capable of publishing stateless events configured via the "applicationEventClass" property.

Author:

Dmitriy Kopylenko, Juergen Hoeller, Rick Evans

See Also:

setApplicationEventClass(java.lang.Class<?>), ApplicationEvent, ApplicationListener, ApplicationEventPublisher, ApplicationContext

Constructor Summary

Constructors

Constructor and Description
EventPublicationInterceptor()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.
Object	invoke(MethodInvocation invocation) Implement this method to perform extra treatments before and after the invocation.
void	setApplicationEventClass(Class<?> applicationEventClass) Set the application event class to publish.
void	setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) Set the ApplicationEventPublisher that this object runs in.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EventPublicationInterceptor

public EventPublicationInterceptor()

Method Detail

setApplicationEventClass

public void setApplicationEventClass(Class<?> applicationEventClass)

Set the application event class to publish.

The event class must have a constructor with a single Object argument for the event source. The interceptor will pass in the invoked object.

Throws:

IllegalArgumentException - if the supplied Class is null or if it is not an ApplicationEvent subclass or if it does not expose a constructor that takes a single Object argument

setApplicationEventPublisher

public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher)

Description copied from interface: ApplicationEventPublisherAware

Set the ApplicationEventPublisher that this object runs in.

Invoked after population of normal bean properties but before an init callback like InitializingBean's afterPropertiesSet or a custom init-method. Invoked before ApplicationContextAware's setApplicationContext.

Specified by:

setApplicationEventPublisher in interface ApplicationEventPublisherAware

Parameters:

applicationEventPublisher - event publisher to be used by this object

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Description copied from interface: InitializingBean

Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.

This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception - in the event of misconfiguration (such as failure to set an essential property) or if initialization fails for any other reason

invoke

public Object invoke(MethodInvocation invocation)
              throws Throwable

Description copied from interface: MethodInterceptor

Implement this method to perform extra treatments before and after the invocation. Polite implementations would certainly like to invoke Joinpoint.proceed().

Specified by:

invoke in interface MethodInterceptor

Parameters:

invocation - the method invocation joinpoint

Returns:

the result of the call to Joinpoint.proceed(); might be intercepted by the interceptor

Throws:

Throwable - if the interceptors or the target object throws an exception